Single Phase Surge Protector Wholesale Manufacturer & Supplier
Type 2 & Type 1+2 single phase surge protectors — IEC 61643-11 CE certified. 3 configurations for TT, TN-S, and TN-C earthing systems. 230V and 120V. DIN rail. Factory-direct wholesale to distributors, EPC contractors & OEM brands. Quote & CE documents within 24h. Part of the TrilPeak SPD range.
Single Phase Surge Protector — Quick Selection Guide
Two questions determine the right single phase surge protector for your installation. Answer both to go straight to the right product.
Most residential and commercial installations. TPK-20 or TPK-40 at the main distribution board. Standard for all TT, TN-S, and TN-C systems.
Rural properties, buildings with lightning rods, or overhead utility connections. TPK-7 or TPK-12.5 — combined protection in one module, no 10m separation required.
| Earthing System | Config | Wiring | Uc |
|---|---|---|---|
| TT — Most residential | 1+1 | L + N + PE | 320V |
| TN-S — Commercial / Industrial | 2+0 | L + N + PE | 275V |
| TN-C — Older industrial | 1+0 | L + PE only | 275V |
Not sure which earthing system? Check your distribution board — TT systems have a separate earth rod. TN-S systems share the neutral-earth bond at the transformer. Selection guide →
Single Phase Surge Protector Range — TPK Series
All models CE certified by ECM Italy · DIN rail · All configurations & Uc voltages in stock · View CE certificate →
Single Phase Type 2 Surge Protector — MDB Installation
Underground cable / no LPS — standard residential & commercial
TPK-20 — 20kA Single Phase Type 2 Surge Protector | DIN Rail
Type 2 · 20kA Imax · Residential & Light Commercial · IEC 61643-11
The TPK-20 single phase surge protector is specified for residential consumer units and light commercial distribution boards. Compact 18mm per-pole DIN rail profile fits standard consumer unit trays. Available in all 3 single-phase configurations for TT, TN-S, and TN-C earthing. Visual status indicator standard. DIN rail guide →
TPK-40 — 40kA Single Phase Type 2 Surge Protector | Pluggable
Type 2 · 40kA Imax · Commercial & Industrial · Pluggable Hot-Swap · IEC 61643-11
The TPK-40 single phase surge protector is the standard specification for commercial panels, industrial control cabinets, and solar PV AC output boards. Pluggable modular cartridge for hot-swap replacement without disconnecting wiring. Optional remote signalling (NO/NC/COM) for BMS integration. Full Type 2 range →
Single Phase Type 1+2 Combined Surge Protector — Overhead Line / LPS
External LPS or overhead supply — eliminates 10m separation requirement
TPK-7 — 7kA Single Phase Type 1+2 Surge Protector | Class I+II
Type 1+2 · 7kA Iimp · Residential & Small Commercial · IEC 61643-11
The TPK-7 combines Class I and Class II protection in one single phase DIN rail module — for residential properties on overhead supply or with an external LPS. No 10m separation requirement between Type 1 and Type 2 stages. Replaces two separate devices, saving panel space and installation time. Type 1+2 guide →
TPK-12.5 — 12.5kA Single Phase Type 1+2 Surge Protector | Industrial
Type 1+2 · 12.5kA Iimp · Industrial & High-Exposure · IEC 61643-11
Enhanced single phase Type 1+2 surge protector for high-exposure installations — industrial facilities, rural agricultural buildings, and solar PV inverter AC outputs subject to frequent lightning events. 12.5kA Iimp with 60kA Imax surge capacity. Pluggable modular design for cartridge replacement without panel shutdown. Solar SPD guide →
Full wholesale range — 3-Phase SPD, DC / Solar PV SPD, Full AC range.
Where to Install a Single Phase Surge Protector
The single phase surge protector installs at the main distribution board (MDB), directly after the main breaker. It clamps residual surge voltage before it reaches all downstream circuits. A Type 3 SPD at the equipment terminal provides additional fine protection.
Only required when overhead supply or external LPS is present. TPK-7 or TPK-12.5 installs at the same MDB — combined Class I+II in one module, no separate service entrance panel needed.
TPK-20 or TPK-40 installed here, directly after the main breaker. Clamps induced surges to ≤1.5kV (Uc 320V) for all downstream circuits. Required at every MDB per IEC 60364-5-53. Lead length must not exceed 0.5m total. Installation guide →
Optional fine protection for sensitive electronics. Type 3 SPD installed at the sub-distribution board or socket outlet, close to the protected equipment. Requires ≥5–10m cable separation from the upstream Type 2 for correct energy coordination.
Why Distributors & OEM Brands Choose TrilPeak for Single Phase Surge Protector Supply
TrilPeak manufactures single phase surge protectors end-to-end — in-house MOV varistor production, 100% per-unit electrical testing, and CE certification from ECM Italy. Factory-direct supply accepted by EU customs and public procurement tenders in 50+ countries.
CE Certified — Not Self-Declared
CE certificates issued by ECM Italy (EU notified body). Third-party type testing to IEC/EN 61643-11:2025. Verifiable on the ECM registry. Accepted at EU customs and public procurement without re-testing.
View CE Certificate →In-House MOV Production
TrilPeak manufactures its own MOV varistor chips — guaranteeing batch-to-batch clamping voltage consistency. 100% per-unit electrical test before shipment. Third-party inspection (SGS / BV / Intertek) welcomed.
Vertical Integration →OEM & Private Label
Custom logo on product and packaging, rebranded datasheets, EU Declaration of Conformity in your company name. ECM CE certification transfers legally to your brand. MOQ negotiable, NDA standard.
OEM Programme →7–30 Day Lead Time
Standard stock models ship in 7–14 days. Custom Uc, configurations, and OEM branding in 21–30 days. Factory-direct pricing — no middleman markup. Sample with full CE test reports within 7 days.
Request Samples →CE certificates, EU DoC, and IEC type test reports available free of charge within 24h.
Single Phase Surge Protector — Frequently Asked Questions
What is a single phase surge protector?
A single phase surge protector (SPD) is installed at a 230V or 120V single-phase distribution board to clamp voltage surges caused by lightning, switching transients, or grid disturbances. Classified as Type 2 (most common — for underground cable supply) or Type 1+2 (for overhead supply or external LPS), per IEC 61643-11. It protects all downstream circuits including sensitive electronics, appliances, and control equipment.
What is the difference between a single phase and 3-phase surge protector?
A single phase surge protector is designed for 230V L-N-PE systems (1+0, 1+1, or 2+0 configurations). A 3-phase surge protector covers 400V L1-L2-L3-N-PE systems (3P, 3P+N, 4P configurations). The earthing mode selection and Uc voltage differ between the two. If you have a single 230V circuit, you need a single phase SPD — for a 400V three-phase system, see our 3-phase range.
Should I choose 1+0, 1+1, or 2+0 configuration?
1+1 (TT earthing): Protects L-PE and N-PE — essential for TT systems where the neutral is earthed separately. Uc 320V. Most common in residential. 2+0 (TN-S): Protects L-PE and N-PE with combined neutral-earth at transformer. Uc 275V. 1+0 (TN-C): Protects L-PE only — for TN-C systems where N and PE are combined. Never use 1+1 on a TN-C system. Full guide →
Why does a TT system need Uc 320V instead of 275V?
In a TT system, an earth fault causes the neutral-earth voltage to rise temporarily (Temporary Over-Voltage, or TOV). A single phase surge protector with Uc 275V would conduct and thermally disconnect under this normal TOV condition — causing nuisance disconnection. Uc 320V provides sufficient margin above the TOV level to prevent false tripping while still clamping genuine surges effectively.
Do I need Type 1+2 or is Type 2 sufficient?
Type 2 is sufficient for most installations with underground cable supply and no external lightning protection system (LPS). Type 1+2 is required when the building is supplied via overhead lines, or when an external LPS (lightning rod) is installed — per IEC 60364-5-53. Type 1+2 combines both classes in one module, eliminating the 10m separation requirement between Type 1 and Type 2 stages.
Can a single phase surge protector protect against direct lightning strikes?
A standard Type 2 single phase surge protector is rated for 8/20 µs induced surges only — it cannot handle the 10/350 µs impulse current from a direct or near-direct lightning strike. If your building has an external LPS (lightning rod) or is supplied via overhead lines, a Type 1+2 SPD is required at the MDB. Type 1+2 is tested to both waveforms and provides complete protection in a single module without requiring a separate Type 1 device.
What is the maximum cable length between a single phase SPD and the main busbar?
IEC 60364-5-53 requires the total lead length — the combined length of the live conductor from busbar to SPD terminal, plus the PE conductor from SPD to earth bar — to not exceed 0.5m. Every 10cm of excess adds approximately 1kV of residual voltage above the SPD's rated Up. A 1m total lead length on a device rated Up 1.5kV can result in an effective installed Up of 2.5kV or higher — exceeding the withstand rating of most distribution equipment. Mount the SPD as close to the busbars as the DIN rail layout allows.
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